Mounting an anchor bridge in watch movements



July 4, 1933. A KUN ET AL 1,916,955

MOUNTING AN ANCHOR BRIDGE IN WATCH MOVEMENTS Filed May 11, 1931 FIGII [I I I 5&3 mm W l V/A/I/ K 1 Kaz n,

Patented July 4, 1933 "UNITED! STATES PATENT orrics ALBERT KUNZ AND CHARLES-FERDINAND PER-BET, 01" LE LOGLE, SXVI'IZERLAND -MOUNTING AN ANCHOR BRIDGE IN MOVEMENTS Application filed May, 11, 1931. Serial No. 536,636, and in Switzerland November 12, 1930.

This invention relates to improvements in the anchor bridges .as used in watches and other time pieces, wherein it has been customary, until the present invention, to support the bridge on the pillar or full plate, as the case may be, by means of feet, these feet determining the position of the bridge on the support, and the bridge being fixed by means such as screws inthe position thus de- 10 termined.

By the invention as hereinafter described in several of its illustrative embodiments, we have succeeded in mounting the bridge in accurate relation with respect to the plate without the interposition of feet as the term has hitherto been recognized in the art. Further, we have embodied in our invention a 1 new manner of assembling the pivots of the anchor and escapement means, as well as a so new type and arrangement of the escapement lever banking pins. In addition to the foregoing novel details, we also have devised a new step in the process of producing anchor bridges.

It follows then, that one object of our invention is to produce anew form of anchor bridge.

Another object is to produce a new assemblage of anchor bridge and plate.

bridge characterized by the absence of feet as the term has been accepted until the pres' ent time.

Another object is to produce a new anchor bridge characterized by the absence of feet.

Another object is to produce a new arrangement of anchor bridge and plate, the

7 bridge being mounted in accurately predetermined position on the plate, without the interposition of feet.

Another object is to produce a new form of anchor bridge capable of receiving the bearings for several pivoted or rotatable objects.

Still another object is to produce a new a form of anchor bridge on which there are means for limiting the oscillations of the escapement lever.

Yet another object is to produce a new form of anchor bridge on which there are two upstruck projections forming banking pins for Another object is to produce an anchor limiting the movement of the escapement lever.

A still further feature of our invention re- ,sides in a new step in the process of produc- I In the drawing, in which two modifications of our invention are shown merely by way of example,

Figs. 1 and 2 are plan views of the two modifications, while I F igL 3 is a sectional view taken on the line IIIIII- of Fig. 1. Referring more particularly to Figs. 1 and 3, it will be seen that the plate 1, which ma be either a pillar plate or a full plate, is pre erably provided with a recess 2, shown as stepped in an upward and outward direction, thus forming'the two shoulders shown in Fig. 1.

arms may be increased at will. These arms. are adapted to fix the bridge in accurately predetermined relationship to the plate 1, and are shown as terminating in so-called adjustment protuberances 5, received in corresponding orifices 6 in the plate 1, these orifices preferably being bored completely through The anchor bridge 3 is shown as provided with at least two outwardly extending arms, it being obvious that the number of the plate, and being shown as encroaching slightly on the stepped portions of the recess P 2. These protuberances 5 preferably are substantially cylindrical in shape and are formed integral with the bridge.

Inspection of Fig. 3 will show that the bridge is preferably formed of comparatively thin metal, which is slightly enlarged in thickness at the protuberances. In the form shown, it is obvious that the snug fit of the protuberances o in the orifices 6 accurately determines the exact position of the bridge with relation to the plate 1, whereupon the bridge is fixed in such position by any suitable means. As shown, such means assume the form of screws 4 passing through the bridge and threaded in the shoulders of the recess 2. These screws, for example, may be r the upper surface-of the plate in any desired manner; and in the preferred form of manufacture these protuberances are struck up simultaneously With the openings 7 and 9.

The modification of Fig. 2 also shows the bridge 3 as being provided with an additional recess 9 for the reception of the jewel or other bearing for the escapement wheel pivot.

,It follows from the foregoing that the bridge may serve for the reception of the pivots of still other moving bodies of the Watch. p

The description set forth above is merely explanatory in nature, and it is obvious that numerous modifications and adaptations of our invention will now readily occur to those skilled in the art. Accordingly, it is intended that the invention be limited only by the scope of the appended claims.

What we claim is Apparatus for adjusting the footless anchor bridge on its support in a horological movement having an escapement Wheel, comprising'an anchor bridge, a support on which the said bridge is adjustably mounted, enlarged cylindrical portions adjacent the periphery of the said bridge, the said support having recesses therein of circular section closely conforming" in shape to the said cylindrical portions and adapted to receive said portions, so that the position ofthe anchor bridge withrespect to its support is exactly determined both vertically and laterally, and banking pins on said bridge for limiting the movement of the escapement lever forthe escapement Wheel, and at least one bearing opening in said bridge for the pivot of the escapement wheel. p

In testimony whereof we have signed our names tothis specification.

ALBERT KUNZ.

CHARLES-FERDINAND FERRET. 

